llvm-project

cac5bfac - [AArch64][GlobalISel] Legalize s16 G_FCONSTANT to avoid widening to G_CONSTANT (#161205)

[AArch64][GlobalISel] Legalize s16 G_FCONSTANT to avoid widening to G_CONSTANT (#161205) When widening a `G_FCONSTANT` it is converted to a `G_CONSTANT` to avoid loss in accuracy (see https://github.com/llvm/llvm-project/issues/56454). This means that some folds such as `G_FPEXT(G_FCONSTANT)` fail to work when the scalar has been widened. This PR legalizes `s16`s by default in line with how s16 `G_CONSTANT`s are treated.